Valve and seat redressing tool



April 30, 1940. SOLBRIG 2,198,925

VALVE AND SEAT REDRESSING TOOL Filed Jan. 26, 19.39

, 4 Sheets-Sheet l April 30, 1940.

G. SOLBRIG 2,198,925 VALVE AND SEAT REDRESSING TOOL 1 Filed Jan. 26, 1939 .Daoenibw April 30, 9 G. SOLBRIG 2.198.925 v VALVE AND SEAT REDRESSING TOOL Filed Jan. 26, 1939 4 Sheets-Sheet 3 I 6 2/6 5021 JOZZJPZZQ By July Hifonneyd April 30, 1940. G. SOLBRIGI I 2,198,925

VALVE AND SEAT REDRESSING TOOL Filed Jan. 26, 1939 4 Sheets-Sheet 4 J9 J9 5712677 2 0] Gz/U'ZaV JOZZD' ZL Q 68 23 5 in; fiflorney Patented Apr- 3 1940 p UNITED STATES PATENT OFFICE 2,198,925 VALVE AND SEAT REDRESSING TOOL Gustav .Solbrig, Cedar Rapids, Iowa, assignor of forty-eight .per cent to William H. Dutton, Minneapolis, -Minn.

Application January 26, 1939, Serial No. 252,895 13 Claims. (01. 51-185) My invention relatesto and provides. an im- Fig. 7 is an enlarged section taken on the line proved device for rapidly and at low cost refacing 'l-l of Fig. 1, some parts being broken away; or dressing the valves and valve seats of internal Fig. 8 is aview corresponding to Fig. but showcombustion engines and the like. ing a modified form of emerylcloth; The objects of the 'invention'will more clearly Fig. 9 is a plan view of the emery cloth shown 5 appear from the following description of several in Fig. 4 removed from the template flange; forms of the device illustrated in the accompany- Fig. 10 is a perspectiveshowing a modified form ing drawings. of the head and flange of the redressing tool;

In advance of the detailed description it may Fig. 11 is a fragmentary perspective showing to advantage be stated that the improved device the relatively fixed portion of the template flange 10 is of such character that itmay be quickly apof Fig. 10 with emery cloth applied to the upper plied between a valve and valve seat of an insurface thereof;

ternal combustion engine without disassembling Fig. 12 is a View corresponding to Fig. 11 showor removing the valve, but simply by'lifting the ing the emery cloth applied to the under surface same from'its seat. The device includes a head of the template flange of Fig. 11; 91

that isadapted to be rotated, preferably by a Fig. 13is a perspective illustrating a still fursmall electric motor or the like, but may also be ther'modified formof the head of the refacing manually rotated or reciprocated. The head of tool, showing the head opened up for application the redressing tool is provided with a'conca voor removal of the emery cloth;

convex conical flange, to the inner and outer faces Fig. '14 is a perspective showing the head of of which abrasive material such as emery or car- Fig. 13 closed up and locked for use; I borundum cloth isarranged to be secured. This Fig. 15 is a section taken on the line Iii-l5 of concave-convex conical flange gives form to both Fig. 14, some parts being shown in full; and

i the inner and outer portions of the abrasive cloth Fig. 16 is a perspective of the emery cloth or or materiaLand hence, as an appropriate name abrasive sheet used in connection with the head this flange is herein frequently called a template illustrated in Figs. 13, 14 and 15.

or template flange. The said flange is of annular What is at present believed to be the preferred form but is provided with a lateral opening or form'of the device is illustrated in Figs. 1 to' 7 gate'jpassage, adapting the stem of the valve to inclusive and will be first described.

pass therethrough when the device is positioned In Figs. 1 and 7 the numeral '20 indicates that between the valve and its seat. portion of the cylinder block of an internal com- Various other-important details in the conbustion engine. of the L type,.the headthereoi s ru t n ment f t e edr s ing t' ol being removed.1. -'Ihis.offset portion 2a is the well are" illustrated'and' will be particularly noted 'in k own. construction and; isshown; as ,1 provided the f l w n p io n n fiw h with two valves: (may of coursehave .anydesired 35,

drawings wherein like-"characters indicate like humber ofvalvesyzfl'normallyengagingjhe c115,7 iifiw hr h ui h e al 1Y1W$n tomary conical/valve seatsn22a=and having valve -Refer1ing t0 thedrawings; stems 23 mounted in theicustomary'wayfandsub- F g-F s l i l i t showin th itqolg n -use ject to a r-coiled": springs 24."'-;;The'se .valves. are: of

a ppl d.be enhevel en e e e an course "mounted for "vertical movements ,;under 40 internal. bu o ngine a lf en only f time cams, the operation of which is well-underthe-engine block;.being;shown;. 2 .-;Y stood. It will also be assumed Ethat theseavalves 2, is afperspective showing the head portion either by i their springs/0r otherwise; while free of theggrindingyor redressing =tool, -some ,parts for vertical movements; are heldagainst rotation; beingbroken away; f wThe head 25"of,.the grinder, as-';preierably de-v i= .Fig. 3 is "a.perspective-1,showingqthetemplate signed,. is a U-shapedstructure-.havingone short formingflange of the tool with-emery cloth or the and. one. long leg or prongythe-latter. at its lower like applied to the.under-or;.outersurface;thereof; endybeingjformed as.part .of orotherwise rigidly Fig. .4 is a perspective showing the emery .cloth' secured to athe;iconcavo-convexaconicahflange illustrated in Fig. 3.removed,fromthe template; designated as the template;v 215... This template 0 Fig... 5 is a view corresponding to Fig-.13 but 28,: iat'aa place diametrically opposite from the showingthe emeryacloth applied to: theqtop or lower end of the long armpi- -the,t,head=,2 5, hasan inner surface of h plat tflanget 'openingiz'l-gthat affordsa gateway; that will pass .:-1Fig.fi-isaplanwviewshowing the-"emery; cloth they-valve stem--13 where-as, presentlyrindicated,

thedevice as, appliedn .-.WO1kin ::.P.Q ti9n% t 5,5

points diametrically opposite from each other and about 90 distant from the lower end of the long arm of the head 25, the template flange 26 has upstanding anchoring lugs or ears 28, the purpose of which will presently appear.

Intermediately pivoted to the short arm of the head 25 at 29 is a lock lever 30 which, at its normally lower end, has a finger lug 3|, for a purpose that will presently appear.

For the application of power to rotate the grinder head, I have shown a small manually operated electric motor 32, the rotor of which, by a customary knuckle joint or the like not shown, is connected to a sleeve 33 equipped at its lower end with a chuck 43. The head 25 is provided with an axially projecting stem 35 adapted to be inserted into the sleeve 33 and to be clamped thereto by the chuck 34. By the means just described, the grinder head is adapted to be power rotated.

For application to the under or outer side of the template 26 there is provided a flexible sheet of abrasive material such as emery or carborundum cloth, best indicated in Figs. 3 and 4 by the numeral 36; and for application to the upper or inner surface of said template, there is provided a somewhat similar sheet 31 of the same or similar material. The sheet 36, in plan view, is approximately C-shaped and has upturned ends formed with perforations 38, through which the anchoring lugs 28 will be passed when the sheet 36 is placed against the bottom of the template. The upper sheet 31 is of somewhat similar form but has diametrically outstanding portions formed with slots 39 through which the anchoring lugs 28 are adapted to pass when the sheet 31 is placed on the upper concave surface of the template, as best shown in Fig. 5.

When only the sheet 36 is applied to the template, as shown in Fig. 3, the device will be adapted to grind or refinish only the valve seat;- and when only the upper sheet 31 is applied to the template, as shown in Fig. 5, the device is then adapted to grind or refinish only the surface of the valve. When, however, both sheets are simultaneously applied to the template, the device is adapted to simultaneouslyrefinishboth the valve and valve seat surfaces under rotation of the head and the abrasive sheets carried thereby. Obviously difierent grades of fineness or coarseness of the abrasive sheets may be employed for the grinding or refinishing operations.

When the lever 30 is turned so that its flange 3| is upward, the lever will engage against or close to the upper surface of the abrasive cloth and thereby close the gateway 2! and also will serve as a counter-balance to the long arm of the head. Fig. 7 shows both of the abrasive sheets 36 and 31 applied to the template 26 for the simultaneous grinding of both valve and valve seat.

In Figs. 8 and 9 there is shown an abrasive sheet 40, difiering in form from that illustrated in Fig. 6 in that the sheet is not provided with a central opening so that when the sheet is applied, as shown in Fig. 8, it would be adapted to grind a valve seat when the valve has been removed. This sheet 40 is provided with slots or openings 4! through which the lugs 28 are adapted to be passed.

In the modified structure illustrated in Figs. 10, 11 and 12 the grinder head 42, which has a stem 43, is provided with a fixed arm 44 and a hingedly connected stem 44. The lower end of the long arm 44 is provided with an approximately semi-circular concave-convex template connection 45 with upstanding lock lugs 46; and the hinged arm 44' i provided with a similar semi-circular concavo-convex template section 41 with upstanding lock lugs 48. A coil spring 43 anchored to the fixed arm 44 is adapted to be coupled to a loop 50 on the hinged arm 44 to hold the two template sections together.

For grinding the valve surface, a flexible abrasive sheet 5|, which is of semi-circular form and which is adapted to be applied to the section 44,

is provided with outstanding lugs having perforations 52 through which the lugs 46 are adapted to be passed. For grinding the valve seat, a somewhat similar abrasive sheet 53 is applied to the under'surface of the section 4'! and is provided with perforated ears 54 through which one of the lugs 48 and one end of the section 41 are adapted to be passed, as shown in Fig. 12. When these two sheets 5| and 53 are applied to the sections 45 and 41 and the device is closed, the device is then adapted for application between avalve and its seat.

In the modified structure illustrated in Figs. 13 to 16 inclusive, the body of thegrinder head'is in the form of a plate 55 having an axially projecting stem 56 .and outstanding portions with passages 51. Hinged to the plate 55 at 58 is a concavo-convex template 59, formed with a gap at 60. The template 59 is provided with upstanding anchoring lugs 6|. As shown in Figs. 14 and 15, the stem 56 is directly secured to angle brackets 62 that are rigidly secured on the top of the plate 55; and these lugs and the lower end of the stem are pivoted at 63 in alignment with perfo- K rations 64 in the lugs 6|. A look pin 65 is adapted to be passed through the perforations 63 and 64 to lockthe template to the plate 55. The plate 55 is shown as provided with a depending flange 66 that will close the gap when the template is locked to said plate 55; i

In Fig. 16 .there is shown in detail a flexible abrasive sheet adapted to be applied to the template, as best shown in Fig. 13. The body of this sheet, indicated at 61, is approximately c-shaped or U-shaped,- and at its central portion has an under-turned portion 68 that is adapted to be placed against the under side of the template when the body of the plate is placed on the upper or concave side of the template. To permit this application and to lock the sheet for rotation Directing attention again particularlyto Figs. 1 to '7 inclusive and assuming that the gate 30 is opened, as shown in Fig. 2, it is evident that when the valve is raised against the tension of its spring, the template flange 26, with the applied abrasive sheet or sheets, may be quickly inserted between the valve seat and the raised valve. The gateway 2'! obviously permits the valve stem to be passed therethrough, and the template properly positioned concentrically with the valve and seat. The tension of the valve spring 24 will press the valve against the upper abrasive sheet and will press the lower abrasive sheet against the valve seat so that when the grinder head 'is then revolved both the valve and the valve seat may be quickly redressed or ground to proper working conditions.

The ease with which the device may be applied, operated and removed without removing the valve g ft BS9328 from'its working position, makes the operation of redressing or finishing valves or valve seats possible at lowcost.

The manner of applying and operatingthe device, as illustrated in Figs. 10 to 16 inclusive, is quite similar to that just described in connection with the preferred form of the device. In either arrangement the grinder can be applied between the valve and its seat without removing the valve from its operating position in respect to the valve seat. The device illustrated in Figs. 10 to 12 inclusive will be closed between the valve and its seat simply by closing the hinged arm 44' in respect to the relatively fixed arm 44 in a manner that has already been noted.

In respect to the device illustrated in Figs. 13

to 16, the template with the attached abrasive sheet will be applied between the valve and seat while the device is opened up, as shown in Fig. 14, and the device will then be closed and put in operative condition by adjusting the parts, as shown in Figs. 14 and 15.

Several forms of the invention have beenillustrated and described, but it will be understood that various other changes in details of construction and arrangement of parts may be made within the scope of the invention disclosed and claimed.

What I claim is:

1. The structure defined in claim 13 in which said template has upstanding anchoring lugs, and in combination with a sheet of flexible abrasive material applied to said template-forming flange and having perforations through which the anchoring lugs are passed.

,2. In a device of the kind described, a rotary grinder head provided with an axially upwardly projecting stem and having a depending laterally ofi'set arm, to the lower end of which arm is secured a concavo-convex annular template located with its axis coincident with the axis of said stem and provided at one side with a gap adapting it to pass a valve stem and to be inserted between the valve and its seat, and in which said template has anchoring lugs between its gap and supporting arm, and a flexible abrasive sheet ap plied to said template and having perforations through which said lugs are passed.

3. In a device of the kind described, a rotary grinder head provided with an axially upwardly projecting stem and having a depending 1aterally offset arm, to the lower end of which arm is secured a concavo-convex annular template located with its axis coincident with the axis of said stem and provided at one side with a gap adapting it to pass a valve stem and to be inserted between the valve and its seat, and in which said template has anchoring lugs between its gap and supporting arm, and a flexible abrasive sheet applied to said template and having perforations through which said lugs are passed, said abrasive sheet being applied both to the upper and lower faces of said template.

4. In a device of the kind described, a rotary grinder head provided with an axially upwardly projecting stem and having a depending later ally ofiset arm, to the lower end of which arm is secured a concavo-convex annular template located with its axis coincident with the axis of said stem and provided at one side with a gap adapting it to pass a valve stem and to be inserted between the valve and its seat, and in which the gap of said template is diametrically opposite to said supporting arm, said template having diametrically opposite upwardly projectmg ancho ng lugslo'ca t'ed between'the gap th'ereof and-saidsupportingarm.

5. In a device of the kind described, a rotary grinder head provided with anaxially upwardly stem and havinga depending laterprojecting ally offset arm, to the lower end of which armis secured a concavo-convex annular template located with its axis coincident with the axis of said stem and provided at one side with a gap adapting it to pass a valve stem and to be inserted between the valve and its seat, and in which said head is provided with a short arm opposite from said long arm and overlying but terminating short of the gap of said template.

6. In a device of the kind described, a rotary grinder head provided with an axially-upwardly projecting stem and having 2. depending laterally offset arm, to the lower end of which arm is secured a concavo-convex annular template located with its axis coincident with the axis of said stem and provided at one side with a gap adapting it to pass a valve stem and to be inserted between the valve and its seat, and

in which said head is provided with a short arm opposite from said long arm and overlying but terminating short of the gap of said template, and a lock lever intermediately pivoted to the lower end of said short arm and adapted to be turned in and out of alignment of the gap of said template. i

7. In a device of the kin-d described, a rotary grinder head having laterally offset depending arms, one of which is relatively fixed and the other of which is hingedly connected, said arms at their lower ends having segmental concavoconvex conical templates, the one facing the other, and means for holding the same templates assembled.

8. In a device of the kind described, a rotary grinder head having laterally offset depending arms, one of which is relatively fixed and the other of which is hingedly connected, said arms at their lower ends having segmental concavoconvex conical templates, the one facing the other, and means for holding the same templates assembled, including a spring anchored to one of said arms and detachably connected to the other.

9. The structure defined in claim '7 in which said templates are provided with upstanding lock lugs.

10. In a device of the kind described, a stem having a rigidly secured plate, and an annular template hingedly connected at one side to one side of said head plate, said template at the side oppositeto its hinge having a gap adapting it to pass a valve stem. p

11. In a device of the kind described, a stem having a rigidly secured plate, and an annular template hingedly connected atone side to one side of said head plate, said template at the side opposite to its hinge having a gap adapting it to pass a valve stem, said template having upstanding perforated lugs, said plate having passages through which said lugs project when the template is closed against the head plate, and a.

and having a portion turned against the under surface of said template;

13. In a device of the kind described, a rotary than 180 that it will pass a valve stem and per grinder head provided with a substantially conimit the template to be inserted between the valve cal template that is an integral part that extends and. its seat, and then act as a substantially comthrough so much more than 180 that it acts plete cone.

5 substantially as a complete cone, but is provided GUSTAV SOLBRIG. 5

with a gap that extends through so much less 

